US7764505B2 - Thermally stable and liquid-tight joint between a first ceramic, metal, or plastic component and a second ceramic, metal or plastic component, and the use of one such joint - Google Patents
Thermally stable and liquid-tight joint between a first ceramic, metal, or plastic component and a second ceramic, metal or plastic component, and the use of one such joint Download PDFInfo
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- US7764505B2 US7764505B2 US10/539,786 US53978603A US7764505B2 US 7764505 B2 US7764505 B2 US 7764505B2 US 53978603 A US53978603 A US 53978603A US 7764505 B2 US7764505 B2 US 7764505B2
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B37/00—Joining burned ceramic articles with other burned ceramic articles or other articles by heating
- C04B37/02—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles
- C04B37/028—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles by means of an interlayer consisting of an organic adhesive, e.g. phenol resin or pitch
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63448—Polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B35/63452—Polyepoxides
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- C04B37/00—Joining burned ceramic articles with other burned ceramic articles or other articles by heating
- C04B37/003—Joining burned ceramic articles with other burned ceramic articles or other articles by heating by means of an interlayer consisting of a combination of materials selected from glass, or ceramic material with metals, metal oxides or metal salts
- C04B37/005—Joining burned ceramic articles with other burned ceramic articles or other articles by heating by means of an interlayer consisting of a combination of materials selected from glass, or ceramic material with metals, metal oxides or metal salts consisting of glass or ceramic material
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- C04B37/008—Joining burned ceramic articles with other burned ceramic articles or other articles by heating by means of an interlayer consisting of an organic adhesive, e.g. phenol resin or pitch
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- C04B37/00—Joining burned ceramic articles with other burned ceramic articles or other articles by heating
- C04B37/02—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles
- C04B37/023—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles characterised by the interlayer used
- C04B37/025—Joining burned ceramic articles with other burned ceramic articles or other articles by heating with metallic articles characterised by the interlayer used consisting of glass or ceramic material
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/48—Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins
- C04B2235/483—Si-containing organic compounds, e.g. silicone resins, (poly)silanes, (poly)siloxanes or (poly)silazanes
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- C04B2237/064—Oxidic interlayers based on alumina or aluminates
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- C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
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- C04B2237/76—Forming laminates or joined articles comprising at least one member in the form other than a sheet or disc, e.g. two tubes or a tube and a sheet or disc
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- C04B2237/80—Joining the largest surface of one substrate with a smaller surface of the other substrate, e.g. butt joining or forming a T-joint
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- C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
- C04B2237/84—Joining of a first substrate with a second substrate at least partially inside the first substrate, where the bonding area is at the inside of the first substrate, e.g. one tube inside another tube
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
Definitions
- the present invention relates to a thermostable and liquid-tight joint between a first component and a second component.
- Such joints are found, for example, in measuring or monitoring devices which are brought into direct contact with a medium to be measured or monitored. These devices frequently require joints, for example, between ceramic components such as sensors or circuit carriers and other, for example metallic structural elements, such as mounts.
- temperature shocks e.g., during immersion of the measuring or monitoring device into the measuring medium, these joints are frequently exposed to extreme mechanical stresses due to the different temperature coefficients and the associated different expansion behavior of the (ceramic and metallic) materials involved. This may result in cracking of the joints, for example.
- DE 43 03 581 A1 describes an electrically insulating, gas-tight lead-through of at least one electrical conductor through a metallic casing of an exhaust system of an internal combustion engine.
- the lead-through is formed by two integral tabs, two consecutive sections being provided in the lead-through direction between them.
- the led-through metallic conductors are electrically insulated from the metallic tabs by a ceramic material, clay in particular.
- a permanently elastic plastic material is used in the subsequent second section as an electrical insulation and sealing material between the conductors and the tabs.
- DE 43 03 581 A1 thus addresses the problem of the gas-tight, electrically insulated lead-through of one or multiple electrical (metallic) conductors through a lead-through of an exhaust system formed by metallic tabs.
- the present invention provides a cost-effective and technically easy to manufacture, thermostable and liquid-tight joint between a first component, ceramic in particular, and a second component, metallic in particular, which may be exposed to an external medium and which reliably withstands rapid and frequent temperature changes (“temperature shocks”).
- a joint has a first bond between the first and the second component and a second bond whose adhesive has a greater elasticity than the adhesive of the first bond and which is placed in such a way that direct contact of the first bond with the external medium is prevented.
- Non-elastic adhesives, ceramic and epoxy resin adhesives in particular, are suitable as adhesives for the first bond, such as: EP21AOHT, EP21CHT-1, EP21TDCHT-1, EP34CA, EP35, EP39 MHT, EP42HT, EP121CL, . . . (Master-Bond Corporation); 7030, 903HP, 989, Durapot 801, Resbond S5H13, Duralco 4460, Duralco 4525, Duralco 4525 EHV, Duralco 4535, . . . (Cotronics Corporation); EP 5430 (Rhenatech Corporation); DER 354 (Dow Corning Corporation).
- Elastic adhesives which are favorably food-compatible, silicone compounds in particular (resins and bonding agents), are suitable as adhesives for the second bond, e.g.,
- VT 3601 E, VU 4691, VU 4694 E, VU 4670 (Peters Corporation); Scrintec 901 (Roth Corporation); 5366, 5367, 5368, 5375, 5398, 5399 (Loctite Corporation).
- a first aspect of the present invention is to provide the use of separately optimized adhesives or adhesives optimizable in their selection.
- the adhesive selected for the first bond may be selected in an optimized manner with regard to the strength of the mechanical joint (fixing) between the first and the second component. This means that a relatively hard, less elastic, strong adhesive having very good mechanical strength properties may be selected.
- an adhesive which features high elasticity, possibly by accepting less strength and hardness may be provided for the second bond.
- a further aspect of the present invention is that the strong adhesive, which ensures the mechanical strength of the joint, may be reliably protected from outside influences, a medium to be measured in particular, by the adhesive of the second bond.
- the latter is advantageously optimized with regard to its resistance vis-à-vis external (e.g., aggressive) media.
- the present invention renders it possible to utilize the advantageous properties of two different adhesives, thereby achieving an overall optimized joint between two materials having very different temperature coefficients and thus different expansion behaviors.
- the first, in particular metallic, component has a pass-through aperture in which the second, in particular ceramic, component is fixed by the first bond.
- the first, in particular metallic, component may preferably be designed as a receptacle sleeve including a centric pass-through aperture and, together with the sleeve casing surface and a layered second bond, forms an exterior contact side to the surrounding, e.g., to a medium to be measured.
- the second bond preferably has a contact side, provided for contact with the external medium, and an inner side, facing away from the contact side but facing and shielding the first bond.
- An embodiment of the present invention in which at least one area of the inner side of the second bond is in direct contact with the first bond is constructively preferred.
- Preferred use of a joint according to the present invention is possible in a sensor assembly of a measuring device which is insertable into a medium to be tested.
- FIG. 1 schematically shows a joint according to one embodiment of the present invention
- FIG. 2 shows a view of a measuring device in which the joint according to one Embodiment of the present invention is used
- FIG. 3 shows a sensor assembly of the device as shown in FIG. 2 .
- FIG. 4 shows a longitudinal section of part of the device as shown in FIG. 2 .
- FIG. 1 schematically shows a joint according to one embodiment of the present invention between a metallic component 1 and a ceramic component 2 .
- the metallic component has a sleeve-shaped design including a pass-through bore 3 and an intermediate plate 5 running transversally therein.
- a bore 8 for passage of ceramic component 2 is provided in intermediate plate 5 .
- the area of bore 8 is filled with a top quality adhesive 10 which firmly embeds a section 12 of ceramic component 2 .
- Adhesive 10 is a particularly strong adhesive which exhibits high adhesivity to metal as well as ceramic materials and, by forming a first bond 14 , ensures secure fixing of the ceramic component in bore 8 .
- Adhesives 10 suitable for these purposes, must have the following properties: They must be very good electrical insulators with as favorable as possible dielectric properties in the entire temperature range. In addition, the adhesives must be able to be used in the temperature range from room temperature to approximately 200 degrees C.
- Exemplary adhesives are, for example, EP21AOHT, EP21CHT-1, EP21TDCHT-1, EP34CA, EP35, EP39MHT, EP42HT, EP121CL (Master-Bond Corporation); 7030, 903HP, 989, Durapot 801, Resbond S5H13, Duralco 4460, Duralco 4525, Duralco 4525 EHV, Duralco 4535 (Cotronics Corporation); EP 5430 (Rhenatech Corporation); DER 354 (Dow Corning Corporation).
- First bond 14 is thus shielded and protected from the exterior surroundings. These exterior surroundings may be formed by a medium 20 to be tested, to be measured, or to be monitored.
- Adhesive 16 of second bond 22 formed in this way has substantially greater elasticity compared to adhesive 10 of first bond 14 and is therefore able to substantially better compensate mechanical and/or temperature-induced stresses. In particular mechanical tensions due to the different temperature expansion behaviors of the different component materials may be better absorbed or compensated by adhesive 16 .
- Adhesives 16 suitable for these purposes are, for example, RTV 102, 103, 106, 108, 109, 112, 116, 118, 159, 19.01, IS 800, 802, 803, 806, 808, SCS 1001-1003, 1009, 1097, 1297 (General Electric Corporation); Loctite Superflex (Loctite Corporation); VT 3601 E, VU 4691, VU 4694 E, VU 4670 (Peters Corporation); Scrintec 901 (Roth Corporation); 5366, 5367, 5368, 5375, 5398, 5399 (Loctite Corporation).
- Exterior side 23 of second bond 22 forms the sole adhesive contact surface 24 to medium 20 and, due to its elastic properties, compensates thermal-related tensions so well that great tightness of the entire joint is ensured.
- First bond 14 situated behind second bond 22 viewed in the direction of the temperature gradient, is advantageously at a distance from contact surface 24 and thus from the direct temperature effect. Cracking caused by brittle, hard adhesives is thus not an issue.
- adhesive 16 may be optimally adjusted to the aggressive properties of medium 20 , for example, and may thus fulfill its protective function vis-à-vis the first bond particularly well.
- a reliable, lastingly tight, and, from the manufacturing point of view, simple and inexpensive joint between a ceramic and a metallic component is created due to the described combination of two separately optimizable bonds.
- FIG. 2 shows a measuring device including a device assembly 30 and a sensor assembly 31 in which the joint according to one embodiment of the present invention is used.
- Sensor assembly 31 includes a feeler board and actual sensor 32 which is enclosed by a protective guard 34 .
- the sensor includes a ceramic (feeler) element which requires a liquid-tight and thermostable lead-through from upper sensor assembly tube 36 .
- Sensor assembly 31 shown in FIG. 3 in an exploded view before installation includes actual sensor 40 which is glued into a bore of a sleeve 42 (sensor receptacle) using a hard adhesive, thereby forming the first bond (see FIG. 1 ).
- the sensor e.g., together with an NTC (negative temperature coefficient) resistor for temperature measurement
- the assembly prepared so far is joined with or soldered to a feeler board 43 which carries electrical circuit elements.
- This system is finally inserted into a protective tube 44 and sensor receptacle 42 is welded to this tube 44 .
- FIG. 4 shows a highly magnified partial longitudinal section of part of the device, completed in this way.
- Use of joint 50 according to one embodiment of the present invention in the measuring device is well visible.
- the joint is made up of a first bond 52 between ceramic component (sensor) 40 and a metallic component (sleeve) 42 and a second bond 54 which covers first bond 52 , thereby protecting it from outside influences and the effects of rapid temperature Changes (“temperature shocks”).
- indicated NTC resistor 56 and weld 58 between Protective tube 44 and sleeve (sensor receptacle) 42 are recognizable in FIG. 4 .
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
Description
Claims (20)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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DE10259746.4 | 2002-12-19 | ||
DE10259746 | 2002-12-19 | ||
DE10259746A DE10259746B3 (en) | 2002-12-19 | 2002-12-19 | Temperature-stable fluid-tight connection between metallic component and ceramic component of sensor group used in measuring device inserted in flow medium |
PCT/EP2003/014425 WO2004056719A1 (en) | 2002-12-19 | 2003-12-17 | Thermally stable and liquid-tight joint between a first ceramic, metal or plastic component and a second ceramic, metal or plastic component, and the use of one such joint |
Publications (2)
Publication Number | Publication Date |
---|---|
US20060257636A1 US20060257636A1 (en) | 2006-11-16 |
US7764505B2 true US7764505B2 (en) | 2010-07-27 |
Family
ID=32336491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/539,786 Expired - Fee Related US7764505B2 (en) | 2002-12-19 | 2003-12-17 | Thermally stable and liquid-tight joint between a first ceramic, metal, or plastic component and a second ceramic, metal or plastic component, and the use of one such joint |
Country Status (4)
Country | Link |
---|---|
US (1) | US7764505B2 (en) |
EP (1) | EP1572599B1 (en) |
DE (1) | DE10259746B3 (en) |
WO (1) | WO2004056719A1 (en) |
Citations (22)
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DE1269024B (en) | 1964-12-08 | 1968-05-22 | Siemens Ag | Process for producing torsion-resistant metal-ceramic connections |
US4019080A (en) | 1971-11-05 | 1977-04-19 | Thomson-Csf | Vacuum-tight seals between ceramic and aluminium components, evacuated envelopes incorporating the components sealed by said method, and vacuum tubes incorporating said envelopes |
US4315974A (en) | 1978-05-01 | 1982-02-16 | Medtronic, Inc. | Electrochemical cell with protected electrical feedthrough |
GB2086288A (en) | 1980-10-23 | 1982-05-12 | Mine Safety Appliances Co | Electrical connection through ceramic wall and method of formation thereof by brazing |
FR2559477A1 (en) | 1984-02-14 | 1985-08-16 | Thomson Csf | Device for connection between a thin ceramic component and a thick metal component and assembly process employing such a device |
FR2643088A1 (en) | 1989-02-16 | 1990-08-17 | Centre Nat Rech Scient | Process for coating based on an element of metallic type of a substrate made of ceramic oxide and ceramic oxides thus coated |
US4955522A (en) | 1988-03-25 | 1990-09-11 | Hoechst Ceramtec Aktiengesellschaft | Process for the leakproof joining of ceramic sealing disks to metallic attachments |
US4984927A (en) * | 1985-09-30 | 1991-01-15 | Ngk Spark Plug Co., Ltd. | Ceramic and metal joining structure |
US5046242A (en) | 1982-07-27 | 1991-09-10 | Commonwealth Of Australia | Method of making feedthrough assemblies having hermetic seals between electrical feedthrough elements and ceramic carriers therefor |
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- 2003-12-17 WO PCT/EP2003/014425 patent/WO2004056719A1/en not_active Application Discontinuation
- 2003-12-17 US US10/539,786 patent/US7764505B2/en not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
DE10259746B3 (en) | 2004-06-24 |
EP1572599A1 (en) | 2005-09-14 |
WO2004056719A1 (en) | 2004-07-08 |
US20060257636A1 (en) | 2006-11-16 |
EP1572599B1 (en) | 2017-02-15 |
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